Re: EMCO 5" And Sherline Spindle/Chucks
Posted by
Alan Marconett KM6VV
on 2000-10-16 13:40:25 UTC
Thanks Doug, (and re-posted on Sherline)
If they quote the spindle at 29mm, then 29mm / 25.4 = 1.1417", so that's
good enough for me. What I'm doing is making a plate so that I can
mount my 3-jaw EMCO chuck on Sherline's rotary table. The 4-jaw might
be even simpler, as T-nuts and longer 10-32's will go right into the
slots on the rotary table! I'm still debating weather to get a metric
tap and tap the plate for M5's, or just use 10-32's, like everywhere
else on the mill, tilting angle plate and bed. HATE to mix up the two,
now that I think about it, I did that once before on a project. Had
these nice Allen Head Cap Screws from some gear I took apart...
80mm sounds like the size of 3-jaw chuck I have. 4-jaw must be 90mm.
I'd hate to have to buy Sherline chucks, if I can use my EMCO's.
I did get a scare trying to thread a new 3/8 end-mill holder onto the
Sherline's spindle. It didn't EVEN want to go on. I just thought my
mill (Sears/Sherline) was too old. then I tried to screw it onto the
chuck adapter that came with the new CNC rotary table. Didn't go on
either! Third try, the adapter from the tilting angle table. Works
fine! So what's going on? I examined the bad adapter using an 8x
loupe, and could see that the threads (rolled?) didn't look too good. I
chased them out with a small file, and some fine sandpaper, and got it
to go on pretty good. I'm working on the spindle threads now. Much
harder work, and I don't want to damage the threads! Any danger here?
I'm not done, it goes on about half way, then gets tight. Hard to see
the threads close enough, hard to work on. I will be at it some more!
These must be close-fit threads? Am I OK in doing this? Spindle had
never been used before, hard to understand why the threads were bad.
Alan
dougrasmussen@... wrote:
If they quote the spindle at 29mm, then 29mm / 25.4 = 1.1417", so that's
good enough for me. What I'm doing is making a plate so that I can
mount my 3-jaw EMCO chuck on Sherline's rotary table. The 4-jaw might
be even simpler, as T-nuts and longer 10-32's will go right into the
slots on the rotary table! I'm still debating weather to get a metric
tap and tap the plate for M5's, or just use 10-32's, like everywhere
else on the mill, tilting angle plate and bed. HATE to mix up the two,
now that I think about it, I did that once before on a project. Had
these nice Allen Head Cap Screws from some gear I took apart...
80mm sounds like the size of 3-jaw chuck I have. 4-jaw must be 90mm.
I'd hate to have to buy Sherline chucks, if I can use my EMCO's.
I did get a scare trying to thread a new 3/8 end-mill holder onto the
Sherline's spindle. It didn't EVEN want to go on. I just thought my
mill (Sears/Sherline) was too old. then I tried to screw it onto the
chuck adapter that came with the new CNC rotary table. Didn't go on
either! Third try, the adapter from the tilting angle table. Works
fine! So what's going on? I examined the bad adapter using an 8x
loupe, and could see that the threads (rolled?) didn't look too good. I
chased them out with a small file, and some fine sandpaper, and got it
to go on pretty good. I'm working on the spindle threads now. Much
harder work, and I don't want to damage the threads! Any danger here?
I'm not done, it goes on about half way, then gets tight. Hard to see
the threads close enough, hard to work on. I will be at it some more!
These must be close-fit threads? Am I OK in doing this? Spindle had
never been used before, hard to understand why the threads were bad.
Alan
dougrasmussen@... wrote:
>
> Alan,
>
> I'm pretty sure that's a "standard" Rohm chuck. I think EMCO used
> Rohm chucks on most of their small machines.
>
> I have an Emco CNC6 which is in the smallest series of CNC
> production lathes they made. With it they threw in a small 3 jaw
> with the 29mm (1.142") mounting bolt pattern. My books say the bolts
> are M5 x 40 DIN 912-6.9. The M5 x 40 DIN business doesn't make any
> sense to me. But, M5 x .8 is a standard which is probably what they
> are. I had to buy a couple new mounting bolts and had no problem
> getting them locally.
>
> My chuck has a 70mm recess in the back which is a snug fit on the
> flat faced spindle. EMCO refers to my chuck as an 80mm.
>
> I have a Rohm power chuck for this machine and have found Rohm's US
> office to be very helpful with information and advice, plus supplying
> machineable jaws. The number I have for Rohm is 1-800-445-7646.
>
> Doug
>
> --- In CAD_CAM_EDM_DRO@egroups.com, Alan Marconett KM6VV <KM6VV@a...>
> wrote:
> > Hi to the list,
> >
> > A little out, but does anyone know if the Compact 5 uses a standard
> > chuck? I have a Craftsman labeled EMCO Compact 5, and I'd like to
> know
> > the bolt circle diameter and
> > thread size of the bolts.
> >
> > I measured the bolt circle at 1.142", and the bolts at .19 (look
> like
> > 10-32, but they must be metric!)", but if it's spec'd, I'd like to
> here
> > the numbers.
> >
> > Alan
>
>
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